US7484670B2 - Blasting method and apparatus - Google Patents

Blasting method and apparatus Download PDF

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Publication number
US7484670B2
US7484670B2 US10/528,390 US52839005A US7484670B2 US 7484670 B2 US7484670 B2 US 7484670B2 US 52839005 A US52839005 A US 52839005A US 7484670 B2 US7484670 B2 US 7484670B2
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Prior art keywords
blasting
expansion volume
line
nozzle
volume
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US20060011734A1 (en
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Jens Werner Kipp
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Priority claimed from DE2002143693 external-priority patent/DE10243693B3/de
Priority claimed from DE10261013A external-priority patent/DE10261013A1/de
Priority claimed from DE10305269A external-priority patent/DE10305269A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier

Definitions

  • the invention relates to a blasting method for cleaning surfaces, wherein a carrier gas is supplied under pressure through a blasting line to a blasting nozzle, and liquid CO 2 is supplied through a feed line, is transformed into dry snow by expansion and is fed into the blasting line, as well as an apparatus for carrying out this method.
  • a blasting method of this type has been disclosed in U.S. Pat. No. 5,616,067 A.
  • the CO 2 is introduced in liquid form into an annular chamber which surrounds the blasting line through which compressed air is passed, and from there the CO 2 is fed into the blasting line through a circular array of converging capillaries, so that the expansion occurs only upon entry into the blasting line.
  • the dry snow thus created is entrained and accelerated by the compressed air and is jetted onto the workpiece to be cleaned via the blasting nozzle.
  • This method is particularly intended for gently cleaning pressure-sensitive surfaces in such as electronic circuit boards.
  • U.S. Pat. No. 5,679,062 describes a blasting method in which gaseous or liquid CO 2 or a mixture of gas and liquid is expanded at the outlet of a nozzle and is introduced into an enlarged vortex chamber in which a part of the gaseous and/or liquid CO 2 is transformed into dry snow.
  • the outlet of the vortex chamber is directly coupled to the blasting nozzle.
  • the carrier gas is formed by the gaseous CO 2 that has been supplied or is produced through evaporation.
  • U.S. Pat. No. 5,725,154 A describes a blasting method in which dry snow is produced by expanding liquid CO 2 by means of an expansion valve. Through a thin tube which is coaxially surrounded by a tube for supplying the carrier gas, the dry snow is supplied to a blasting pistol which then jets out in a mixture of carrier gas and dry snow.
  • WO 00/74 897 A1 discloses a blasting apparatus in which liquid CO 2 is supplied via a capillary which opens into a conically divergent nozzle the diameter of which increases towards the outlet to approximately three times the diameter of the capillary.
  • This nozzle is surrounded by an annular Laval nozzle in which the carrier gas that has been supplied under pressure is accelerated to supersonic speed.
  • the mouths of the CO 2 nozzle and the Laval nozzle are level with one another, so that two concentric jets are produced, i.e. an inner jet consisting mainly of dry ice and a jacket jet which is to accelerate the dry ice outside of the nozzle.
  • blasting methods described above are not suitable for these kinds of application, because the achievable volume flow rates and jet speeds are not sufficient and/or because dry snow is not produced in a sufficient amount or does not have the correct composition, so that the kinetic energy of the particles of dry snow is to small.
  • blasting equipments have heretofore been used in which dry ice or dry snow is stored in solid form in suitable cooling tanks and is metered into the flow of compressed air.
  • the compressed air and the dry snow serving as blasting material are then delivered together through a pressure hose which connects the blasting equipment to the blasting nozzle.
  • blasting methods and apparatus of this type require cumbersome installations and correspondingly high equipment costs as well as high expenses for storing the dry snow.
  • the CO2 is supplied from the feed line into the blasting line via an enlarged expansion volume.
  • the production of strongly abrasive dry snow or dry ice is achieved simply by providing an expansion volume with sufficiently large volume.
  • the larger expansion volume between the mouth of the feed line and the point of entry into the blasting line leads to a temporary reduction of the flow velocity and hence to an increased particle density, so that the finely dispersed dry snow particles that are at first created upon expansion agglomerate or condense to larger particles before they are entrained by the flow of the carrier gas.
  • the volume V of the expansion volume may be given in relation to a flow rate ⁇ of liquid CO 2 .
  • the relation which should be observed is: V/ ⁇ > 0.2 m 3 s/kg, preferably V/ ⁇ > 0.6 m 3 s/kg.
  • the method may also be practised with a smaller volume of the expansion volume, if the smaller volume is compensated for by a larger pressure and a correspondingly increased flow rate of the carrier gas and/or if the expansion volume has a sufficient length, for example a length at least 15 or 30 mm.
  • the temperature prevailing in the expansion volume is considered to be an important factor for the production of strongly abrasive particles of dry ice.
  • This temperature should preferably be low, preferably below ⁇ 40° C.
  • a sufficient flow rate of carrier gas e.g. 0.75 m 3 /min
  • the flow rate of liquid CO 2 is in an optimal ratio to the flow rate of air, e.g. in the order of magnitude of 0.1 to 0.4 kg CO 2 per m 3 carrier gas (volume under atmospheric pressure)
  • the cooling effect caused by the evaporation of CO 2 appears to be so large that the expansion volume is kept on a sufficiently low temperature.
  • an expansion volume is thermally insulated from the environment, so that the desired high cleaning effect can also be achieved with a small volume of the expansion volume and small flow rates.
  • the feed line for liquid CO2 is also thermally insulated from the environment and has a good thermal contact with the walls of the expansion volume (e.g. by means of a heat exchanger), so that the liquid CO2 is pre-cooled already to some extent in the feed line.
  • the supply of heat via the walls of the expansion volume and the blasting line and the sublimation of CO2 caused thereby tends to loosen the crust.
  • the crust finally assumes an inhomogeneous, granulated and relatively brittle structure, with the result that the carrier gas passing-by with high speed permanently erodes coarse dry ice particles from the crust, and these particles then form part of the blasting material.
  • the blasting apparatus has at least one swirl edge in the flow path between the mouth of the feed line for the liquid CO2 and the blasting nozzle.
  • This swirl edge may for example be formed at the transition point between the expansion volume and the blasting line, when the expansion volume opens laterally into the blasting line.
  • such swirl edges may also be formed by an internal threading in a pipe section forming the expansion volume or by stationary or moveable internal structures such as a propeller wheel, a worm or the like in the expansion volume.
  • Suitable for executing the method is also a blasting apparatus having a source of liquid CO2, an expansion nozzle connected to said source for generating dry snow, and a blasting nozzle connected to a pressure source and converging towards a constriction an diverging from the constriction for accelerating the dry snow, wherein the expansion nozzle is arranged upstream of the constriction.
  • the expansion volume enters into the straight blasting line at an angle of about 10 to 90°, preferably 20 to 45° in the flow direction.
  • the flow of the carrier gas produces a certain drag, and the dry snow is gently deflected into the flow direction in the blasting line.
  • the flow of the carrier gas in the blasting line has a component transverse to the longitudinal direction of the expansion volume, it is to be expected that a vortex is created at least in the downstream portion of the expansion volume, which vortex prolongs the dwell time of the dry snow in the expansion volume and hence the agglomeration and the growth, respectively, of the particles and the crust, respectively, of dry ice.
  • the angle of entry is preferably more acute in order to prevent the dry ice from impinging onto to the opposing wall of the blasting line.
  • the point of entry of the expansion volume into the blasting line is located in a small distance upstream of the blasting nozzle.
  • the blasting nozzle preferably has a constriction, so that the carrier gas and the blasting material are accelerated to high speed.
  • the configuration of the blasting nozzle as a Laval nozzle in which an acceleration to approximately sonic speed or supersonic speed is achieved.
  • the distance between the point of entry of the expansion volume into the blasting line and the constriction of the blasting nozzle should preferably be larger than the diameter of the blasting line.
  • the cross-sectional area of the constriction of the Laval nozzle should be selected larger than it would be selected in the case that the medium is supplied with like pressure and like flow rate only via the blasting line.
  • the sublimation of dry snow increases the gas volume and leads to an acceleration of the flow of gas before, in or behind the constriction of the nozzle.
  • droplets of liquid CO2 may also enter into the blasting line or the blasting nozzle and evaporate there.
  • the flow rate of the carrier gas is too large so that a high dynamic pressure is built up in front of the blasting nozzle, the amount and the cleaning effect of the generated dry snow is reduced. It is therefore convenient to provide a metering valve in the blasting line upstream of the point of entry of the expansion volume, for optimally adjusting the flow rate of the carrier gas.
  • a metering valve is provided in the feed line for liquid CO2 immediately at the point of entry into the blasting apparatus, so that the ratio of flow rates of carrier gas and CO2 may be adjusted immediately at the blasting apparatus.
  • a small amount of water or of another solid or liquid blasting material is injected into the flow of carrier gas and/or into the expansion volume in order to further enhance the cleaning effect.
  • FIG. 1 shows a sectional view of a blasting apparatus for carrying out the method according to the invention
  • FIG. 2 is a sectional view of a blasting apparatus according to modified embodiment
  • FIG. 3 shows an enlarged detail of FIG. 2 ;
  • FIG. 4 is a schematic sectional view of a blasting line which tapers step-wise
  • FIGS. 5 to 7 show sectional and front views of a nozzle of the blasting apparatus.
  • a blasting line 10 is formed by a straight cylindrical pipe which has an internal diameter DL of 39 mm.
  • An inlet port 12 of the blasting line is connected to a compressor which has not been shown and from which compressed air is supplied with a pressure of 1.1 MPa, for example.
  • the blasting nozzle 14 configured as a Laval nozzle is coupled to the mouth of the blasting line 10 .
  • the blasting nozzle has a convergent section 16 the internal diameter of which decreases from 32 mm at the upstream end to 12.5 mm at a constriction 18 , and a divergent section 20 the internal diameter of which increases from the constriction 18 to 19 mm at the downstream end.
  • the total length LL of the blasting nozzle is 224 mm.
  • the length LC of the converging section 16 is 83 mm.
  • a connecting sleeve 22 between the blasting line 10 and the Laval nozzle 14 has an internal diameter of approximately 32 mm, corresponding to the upstream diameter of the blasting nozzle.
  • the pipe forming the blasting line 10 has a branch 24 which enters into the blasting line 10 at an angle of 45° in flow direction.
  • the distance D between the branch 24 and the upstream end of the blasting nozzle 14 is approximately 66 mm.
  • a metering valve 26 a ball valve for example, is arranged in the blasting line 10 upstream of the branch 24 .
  • a tubular transition piece 28 is screwed into the branch 24 , and the upstream end of the transition piece is connected to a flexible feed line 32 for liquid CO2 through an adapter 30 .
  • the feed line 32 is connected to a pressure bottle, which has not been shown and which accommodates an amount of CO2 under such a pressure that the CO2 remains liquid at environmental temperature. This pressure amounts to approximately 5.5 MPa, for example, for an environmental temperature of 20° C.
  • the feed line 32 has an internal diameter of 3 mm.
  • the liquid CO2 exits through the feed line 32 due to the differential pressure, without any need for active displacement means.
  • the flow rate is limited by the small cross section of the feed line 32 .
  • the transition piece 28 forms an expansion volume 34 which has two sections 36 , 38 with different diameters.
  • the upstream section 36 directly adjacent to the feed line 32 has an internal diameter DC 1 of 20 mm and a length L 1 of 85 mm.
  • the downstream section 38 adjoins via a short conical section and has an internal diameter DC 2 of 32 mm and a length L 2 of 105 mm.
  • the total length LE of the expansion volume 34 is thus 190 mm.
  • the branch 24 has an internal diameter DC 3 of 39 mm, identical with the internal diameter DL of the blasting line 10 .
  • the liquid CO2 can expand abruptly. This causes a part of the CO2 to be evaporated. The evaporation and decompression leads to a reduction in temperature, so that another part of the liquid CO2, which is finely dispersed at entry into the expansion volume, condenses to fine particles of dry snow. Since the cross-sectional area of the upstream section 36 of the expansion volume 34 is approximately 44 times the cross-sectional area of the feed line 32 , the mixture of gaseous CO2 and dry snow passes through the upstream section 36 of the expansion volume at moderate speed. At entry into the downstream section 38 the speed is reduced further.
  • the fine particles of dry snow may aggregate to larger particles (agglomeration). Since the flow velocity decreases upon entry into the downstream section 38 and, accordingly, the dynamic pressure increases, the particles may also grow to some extent through re-condensation of gaseous CO2. Thus, at entry into the still larger branch 24 , relatively large dry snow particles have formed, which are now sucked by the drag of the compressed air passing through the blasting line 10 and are entrained towards the blasting nozzle 14 . In the blasting nozzle 14 , the compressed air and the dry snow are accelerated to high speed, possibly to supersonic speed, so that a jet with high cleaning efficiency exits from the blasting nozzle. When this jet impinges on a surface to be cleaned, the dry snow acts as a blasting material for efficiently cleaning the surface.
  • a hose section of considerable length may be provided between the point where the expansion volume opens into the blasting line, and the blasting nozzle 14 .
  • feed lines 32 entering into the blasting line 10 via respective expansion volumes.
  • the points of entry of the expansion volumes into the blasting line may be distributed over the periphery of the blasting line and/or may be offset in axial direction. It is also possible to have a plurality of feed lines 32 opening into a common expansion volume.
  • another carrier gas may be supplied via the blasting line 10 .
  • Another blasting material may be added to this carrier gas or to the compressed air.
  • additional solid or liquid blasting media entering into the blasting line via lateral feed lines upstream or downstream of the branch 24 or possibly also into the expansion volume 34 .
  • FIG. 2 shows a blasting apparatus according to a modified embodiment.
  • the expansion volume 34 is formed only by the interior of the branch 24 .
  • This branch has an internal threading 40 into which the adapter 30 has been screwed-in.
  • a metering valve 42 is provided in the feed line 32 at a small distance upstream of the adapter 30 , so that the flow rate of liquid CO2 may be adjusted.
  • a flow rate of liquid CO2 of approximately 0.1 to 0.3 kg per m3 carrier gas (air) has proved to be a favourable setting (the flow rate of carrier gas is given as the volume of carrier gas under atmospheric pressure).
  • the portion of the blasting line 10 which includes the branch 24 , and the portion of the feed line 32 directly adjacent to the adapter 30 are embedded in a sheath of thermally insulating material which has been shown in dotted lines in the drawing. This facilitates not only the handling of the pistol-type blasting apparatus but also improves the thermal insulation of the expansion volume 34 and the portion of the feed line adjacent thereto, so that a low temperature in the expansion volume is achieved.
  • the branch 24 has been shown in an enlarged scale. It can be seen that the internal threading 40 extends beyond the adapter 30 and forms a part of the internal wall of the expansion volume 34 .
  • the flow path for the dry snow from the mouth of the feed line 32 into the blasting line 10 is limited by a number of swirl edges.
  • a first swirl edge is formed directly by the abrupt increase in cross section from the feed line 32 to the internal cross section of the expansion volume 34 at the internal surface of the adapter 30 .
  • Other swirl edges are found at the point of entry of the branch 24 into the blasting line 10 .
  • the grooves of the internal threading 40 also act as swirl edges.
  • the particles of dry ice may even grow further on their way through the blasting nozzle 14 , because they are swept and accelerated by the carrier gas which contains finer particles of dry snow.
  • the exact location where the agglomeration of dry ice and the formation of the crust 46 takes place depends on the specific conditions and may shift (in both directions) more or less into the blasting line 10 and possibly into the blasting nozzle 14 .
  • the expansion volume 34 has the same internal diameter as the blasting line 10 , it may however has have a smaller internal diameter, if desired.
  • the angle at which the branch 24 merges into the blasting line 10 may also be varied, preferably in a range between 20 and 45°.
  • the length LE of the expansion volume (measured on the central axis) is approximately 49 mm, and the diameter DC 3 of the expansion volume is 32 mm.
  • the expansion volume 34 has a volume V of approximately 39 cm3.
  • the feed line 32 has an internal cross-sectional area of 7 mm2, corresponding to a diameter of 3 mm, the ratio V1/3/A1/2 is approximately 12.8.
  • the air flow rate through the blasting line 10 is preferably between 3 and 10 m3/min, with an optimum at about 5.5 m3/min.
  • the corresponding flow rates j of CO2 are approximately 0.0015 kg/s to 0.05 kg/m3 and 0.023 kg/s, respectively, for the optimum.
  • the corresponding values for the ratio V/j are then 0.0026-0.0008 m3 s/kg and 0.0018 m3 s/kg for the optimum.
  • the constriction 18 of the blasting nozzle 14 has a diameter of 13.1 mm.
  • the blasting line 10 has a smaller internal diameter of 12.7 mm, the diameter DC 3 of the expansion volume 34 is also 12.7 mm, and the length LE of the expansion volume is approximately 37 mm.
  • the expansion volume has a volume V of about 4.7 cm3.
  • the air flow rate is then preferably between 1.5 and 2.5 m3/min.
  • the CO2/air ratio is again 0.3 kg/m3, one obtains a value between 0.00062 and 0.00037 m3 s/kg for the ratio V/j.
  • the value of V1/3/A 1/2 is in this case approximately 6.3.
  • the constriction 18 of the blasting nozzle 14 preferably has a diameter of 8 mm.
  • the internal cross section of the blasting line remains essentially constant
  • embodiments are possible in which this internal cross section varies.
  • the internal cross section of the blasting line may be reduced in two steps, with smooth transitions, as is shown in FIG. 4 .
  • Possible positions for the branch 24 have also been shown in FIG. 4 .
  • the expansion volume should not be too small and, in particular, should not have a too small length.
  • the length of the expansion volume is 100 mm or more.
  • the feed line 32 has an internal diameter of 3 mm in the shown embodiments, other embodiments are possible, in which the feed line 32 upstream of the expansion volume 34 or preferably at the point of entry into the expansion volume has a diameter of only 1.0 or 1.3 mm.
  • a cold tank may be provided in which the CO2 is kept liquid at a temperature of approximately ⁇ 20° C. and at a pressure of less than 2.2 MPa, e.g. 1.8 MPa.
  • FIGS. 5 to 7 show a modified embodiment of the blasting nozzle 14 , which has the function of a Laval nozzle but is configured as a flat nozzle and permits to create a fan-like divergent jet having a relatively uniform density and velocity profile over its width.
  • This blasting nozzle has, on the upstream end, a cylindrical portion 14 a with a length La and an internal diameter Da, which is adjoined by a transition piece 14 b with the length Lb.
  • Adjoining on the downstream side is a flattened section 14 c with a length Lc and a rectangular internal cross section.
  • the transition piece 14 b serves for adapting the cylindrical internal cross section of the section 14 a to the rectangular internal cross section of the section 14 c .
  • This rectangular internal cross section has an essentially constant with W and a height which increases from a value H 1 at the constriction, at the end of the transition piece 14 b to a somewhat larger value H 2 at the mouth.
  • W is practically constant. If at all, the width W may increase slightly in the vicinity of the mouth.
  • the blasting nozzle 14 according to FIGS. 5 to 7 has the following dimensions:
  • the internal surface in the flattened section 14 c has corrugations which, in the example shown, are formed by longitudinal ribs 14 b . Such corrugations lead to a significant reduction of noise, especially in the supersonic mode.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Nozzles (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Recrystallisation Techniques (AREA)
US10/528,390 2002-09-20 2003-07-01 Blasting method and apparatus Expired - Fee Related US7484670B2 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE10243693.2 2002-09-20
DE2002143693 DE10243693B3 (de) 2002-09-20 2002-09-20 Strahlverfahren und-vorrichtung
DE10261013.4 2002-12-24
DE10261013A DE10261013A1 (de) 2002-12-24 2002-12-24 Strahlverfahren und-vorrichtung
DE10305269.0 2003-02-07
DE10305269A DE10305269A1 (de) 2003-02-07 2003-02-07 Strahlverfahren und -vorrichtung
PCT/EP2003/007011 WO2004033154A1 (de) 2002-09-20 2003-07-01 Strahlverfahren und -vorrichtung

Publications (2)

Publication Number Publication Date
US20060011734A1 US20060011734A1 (en) 2006-01-19
US7484670B2 true US7484670B2 (en) 2009-02-03

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US10/528,390 Expired - Fee Related US7484670B2 (en) 2002-09-20 2003-07-01 Blasting method and apparatus

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US (1) US7484670B2 (da)
EP (1) EP1501655B1 (da)
CN (1) CN100500380C (da)
AT (1) ATE322357T1 (da)
AU (1) AU2003249922A1 (da)
BR (1) BR0306448A (da)
DE (1) DE50302893D1 (da)
DK (1) DK1501655T3 (da)
ES (1) ES2260691T3 (da)
MX (1) MXPA05003096A (da)
WO (1) WO2004033154A1 (da)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
US20080092923A1 (en) * 2005-02-05 2008-04-24 Cryosnow Gmbh Device and Process for Cleaning, Activation or Pretreatment of Work Pieces by Means of Carbon Dioxide Blasting
US20140196749A1 (en) * 2013-01-15 2014-07-17 Applied Materials, Inc. Cryogenic liquid cleaning apparatus and methods
WO2020123697A1 (en) * 2018-12-11 2020-06-18 Oceanit Laboratories, Inc. Reduced noise abrasive blasting systems
US20200282517A1 (en) * 2018-12-11 2020-09-10 Oceanit Laboratories, Inc. Method and design for productive quiet abrasive blasting nozzles
US11780051B2 (en) 2019-12-31 2023-10-10 Cold Jet, Llc Method and apparatus for enhanced blast stream

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DE102004051005A1 (de) * 2004-07-13 2006-02-02 Jens Werner Kipp Strahlvorrichtung für eine effektive Umwandlung von flüssigem Kohlendioxid in Trockenschnee- bzw. Trockeneispartikel
US7293570B2 (en) * 2004-12-13 2007-11-13 Cool Clean Technologies, Inc. Carbon dioxide snow apparatus
DE102005002365B3 (de) * 2005-01-18 2006-04-13 Air Liquide Gmbh Strahlverfahren und Vorrichtung zur Reinigung von Oberflächen
DE102007009090A1 (de) 2007-02-24 2008-08-28 Mycon Gmbh Vorrichtung und Verfahren zur Entgratung von Kunststoffteilen mittels Kaltstrahlverfahrens mit mechanischer Unterstützung durch ein Spezialwerkzeug
US20090139539A1 (en) * 2007-11-29 2009-06-04 Joel Heimlich Method and apparatus for cleaning
ES2420974T3 (es) 2007-12-10 2013-08-28 Jens-Werner Kipp Dispositivo de proyección de hielo seco
DE102008028433A1 (de) 2007-12-10 2009-06-18 Kipp, Jens Werner Strahlverfahren- und Vorrichtung für Trockenschnee mit einer Beschleunigung mittels Trägergas, dass bereits mit Kleinmengen Trägergas arbeitet
DE102008027253A1 (de) 2008-06-06 2009-12-10 Jens Werner Kipp Strahlvorrichtung für Trockenschnee
DE102008018934A1 (de) * 2008-04-04 2009-10-08 Linde Ag Vorrichtung zur Reinigung von Oberflächen mit modularem Aufbau
DE102008037088A1 (de) 2008-08-08 2010-02-11 Linde Ag Düsenelement zum Ausgeben CO2-Schnee und Verfahren zur Herstellung von CO2-Schnee
DE102008037089A1 (de) 2008-08-08 2010-02-11 Linde Ag Vorrichtung und Verfahren zum Reinigen von Gegenständen mittels Trockenschnee
DE102008047432A1 (de) 2008-09-15 2010-04-15 Linde Ag Vorrichtung und Verfahren zum Erzeugen von Trockeneisschnee
DE102009043033A1 (de) 2008-12-03 2010-06-10 Sms Siemag Ag Vorrichtung und Verfahren zur Reinigung von Rollen und/oder Walzen in Gießanlagen, Walzwerken oder Bandprozesslinien
US8187057B2 (en) * 2009-01-05 2012-05-29 Cold Jet Llc Blast nozzle with blast media fragmenter
DE202009018911U1 (de) 2009-02-16 2014-07-08 Jens-Werner Kipp Reinigungsvorrichtung für die Reinigung empfindlicher Oberflächen
DE102009016116A1 (de) 2009-04-03 2010-10-14 Jens Werner Kipp Reinigung von Oberflächen mittels aus flüssigem CO2 gewonnenen Trockenschnee bei vorheriger Kühlung des flüssigen CO2
FR2947748B1 (fr) * 2009-07-09 2015-04-17 Air Liquide Coupage par jet de gaz cryogenique liquide additionne de particules abrasives
JP2011207664A (ja) * 2010-03-30 2011-10-20 Showa Tansan Co Ltd ドライアイス粒子の噴射装置
JP5605939B2 (ja) * 2010-03-30 2014-10-15 昭和電工ガスプロダクツ株式会社 ドライアイス粒子の噴射装置
DE102010060716A1 (de) 2010-11-22 2012-05-24 Jens-Werner Kipp Verfahren und Vorrichtung zum Reinigen von Filtern
DE102010036928A1 (de) 2010-08-10 2012-02-16 Jens-Werner Kipp Verfahren und Vorrichtung zum Reinigen von Filtern
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ES2260691T3 (es) 2006-11-01
EP1501655B1 (de) 2006-04-05
US20060011734A1 (en) 2006-01-19
DE50302893D1 (de) 2006-05-18
ATE322357T1 (de) 2006-04-15
AU2003249922A1 (en) 2004-05-04
CN1681623A (zh) 2005-10-12
DK1501655T3 (da) 2006-08-07
WO2004033154A1 (de) 2004-04-22
EP1501655A1 (de) 2005-02-02
MXPA05003096A (es) 2005-11-17
CN100500380C (zh) 2009-06-17

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